I have been using Aptana for years now, and have become accustom to its many features.
It has been reliable up until I upgraded from Xubuntu 13.04 to 14.04.
Now
From what i gathered around the internet, it seems to be a problem with webkit, what did the trick for me was removing the library:
apt-get purge libwebkitgtk-1.0-common
The problem is, other programs like the gimp use that library...
Or you may turn off the contextual help like guyfromfl suggested.